Took the 28-60 out for an hour earlier (on my A7 mk1) and while the weather was miserable, I managed to get a few shots that I was happy with, and the pick of the bunch is attached.
I'm no expert, so take this with a pinch of salt, but I thought the lens was nice - there was no noticeable lag with shooting and while there were a couple of occasions I would have liked it to extend to 70, for the most part it was more than enough for a Sunday stroll.
I'm glad I didn't pay the full £449 for it, and for those with GMs or a larger budget would probably already have something better at their disposal, but for those looking for a cheaper lens, it's a step up from the kit 28-70 in my opinion.